Dictionary of Human Evolution and Biology

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Information stored in the central nervous system that is retrievable by the individual. It has been theorized that memory is stored in a structure called an engram, which is a series of neurons and/or synapses that become physically changed and form an association with one another; not all researchers accept this concept. In humans short-term memory lasts for a few seconds to a few minutes; long-term memory lasts considerably longer and can last the life of the person.

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